F – 14 Inlet: Square To CIRCLE. Subsonic Air EXPANDS. Diffuser SLOWS It. Aerodynamic MAGIC. General Leave a Comment on F – 14 Inlet: Square To CIRCLE. Subsonic Air EXPANDS. Diffuser SLOWS It. Aerodynamic MAGIC. Source: F – 14 Inlet: Square To CIRCLE. Subsonic Air EXPANDS. Diffuser SLOWS It. Aerodynamic MAGIC. (Visited 1 times, 1 visits today)